gcc: Conditional set SRC_URI_GCC and SRC_URI_GDB allow setting it extern
gcc: Conditional set SRC_URI_GCC and SRC_URI_GDB allow setting it extern

Used by e.g. Linaro gcc and gdb resident on launchpad

sknsean/core,hundeboll/core,diorcety/oe-lite-core,sknsean/core,sknsean/core,hundeboll/core,hundeboll/core,sknsean/core,hundeboll/core,diorcety/oe-lite-core,sknsean/core